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Issues
44
Articles
690

Welcome

"Proceedings of Gubkin Russian State University of Oil and Gas" is a collected volume containing leading edge contributions in fundamentals and applications of oil and gas science.

The journal is published quarterly.

The scope of research papers includes the following topics: Geology, Geophysics; Drilling, Development, Production; Transportation, Storage; Processing, Chemistry of Oil and Gas; Computerized Control Systems, Modeling of Oil and Gas Production; Economics, Management.

Subscription index in the "Russian Press" agency: 13166

This publication is the property of Gubkin Russian State University of Oil and Gas and its reproduction by any means without the consent of the University is prohibited.

Recent issue № 4/297, 2019

Name
Authors
Characterization and oil-oil correlation for the Mil Qasim and Sarqala oilfields based on bio-markers analysis, Kurdistan, Northern Iraq
Gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS) methods are used to analyze crude oils obtained from Mil Qasim (MQ-1) and Sarqala (S-1) oilfields of south-eastern part of Iraqi Kurdistan using different biomarkers coefficients. Biomarkers characterization are used to provide information on the source of the organic matter, depositional environment, degree of maturity, age determination of the crude oils and their correlation between each other. The used data include normal alkanes and acyclic isoprenoids distributions, terpans, hopanes, steranes and diasternes aliphatic biomarkers, the distribution of aromatic biomarkers naphthalenes, dibenzothiophene, phenanthrene, methyldibenzothiophenes and stable carbon isotope. The oil samples from Mil Qasim and Sarqala oilfields are characterized by a low Pr/Ph ratio (< 1,0), a relatively low oleanane ratio, abundance of moderate C27 regular steranes and diasteranes, a relatively high C30 sterane index, the presence of tricyclic terpenes, relatively high dibenzothiophene / phenanthrene ratios, high CPI ratio (≥ 1,0) and high Ph/nC18 ratio. All of the above parameters indicate that the source rocks represented by calcareous marls were deposited under anoxic — reducing marine environments with type II of organic matter and were generated at moderate stage of maturity. All of the age diagnosed biomarker parameters indicate that the source of oils in Mil Qasim and Sarqala oilfield are the Lower Cretaceous formations (Balambo-Qamchuqa formations). Two samples of oil from the Mil Qasim field (MQ-1) and oil samples from the Sarkal field (S-1) show an excellent oil-oil correlation based on the comparison of biomarker characteristics.<
Тhe model of the geological structure of the lower crayric and jurician deposits of the aquatoria of the Ob guba of the Kara sea in connection with the prospects of oil and gas
On the basis of many years of geological and geophysical research and a large amount of factual material, the rationale for the discovery of oil deposits in the Lower Cretaceous and Jurassic sediments of the Ob Bay of the Kara Sea has been given.
On the territory of the Yamalo-Nenets Autonomous District, including the Ob-Taz Bay, more than 2,700 hydrocarbon (HC) deposits have been explored. The most studied is the middle part of the Ob Bay, where large gas-condensate deposits are discovered in Cretaceous sediments.
Promising oil and gas complexes of the Jurassic and Neocom are characterized by the presence of seasoned fluid seals separating the selected productive complexes. The reservoir potential of the main productive strata is confirmed by the results of testing deposits on the adjacent land. From the test results of a group of large deposits located on land (Parusovoye, Novoportovskoe, and others) on both sides of the Ob Bay, oil shows that oil is present both in neocom sediments and in the Jurassic.
The geochemical data from studies of the oil-bearing strata, the degree of their catagenetic transformation, as well as a detailed analysis of the properties and composition of hydrocarbon fluids of the Lower-Middle Jurassic and Pre-Jurassic deposits of the northern part of the West Siberian NGB, showed the possibility of the presence of oil deposits in the sediments that have not yet been studied by drilling.
The task of prospecting works in the lips of the lips is currently to identify new deep-seated anticlinal structures capable of containing industrial deposits not only of gas, but also of oil.
Geodynamic evolution and conditions for formation of hydrocarbon traps in junction zone of Pre-Ural marginal trough and advanced folds of Urals based on structural-kinematic modeling
Currently, there are many promising objects for the search for accumulations of hydrocarbons (HC). In many drilled oil and gas fields, intense oil and gas occurrences, evidence of possible accumulations of oil and gas are noted. Despite a rather wide regional geological exploration and development of hydrocarbon resources, poorly studied structures characterized by the development of folded-thrust dislocations are promising from oil and gas perspective.
The use of kinematic modeling technology allows to restore the history of the geological development of the region, to study the features of the formation of the modern morphostructure of the sedimentary cover, and also to assess the balance of structural plans and the direction of tectonic movements over the area and in time, as well as to typify discontinuous disturbances and determine the time of their formation.
The article presents the results of a detailed study of the features of the tectonic structure and geodynamic evolution of the sedimentary basin of the Ural fold system, as well as the mechanisms of formation of reverse-thrust structures based on structural-kinematic modeling. The conditions for the formation of hydrocarbon traps associated with dislocational thrust type dislocations are determined, faults are typified within the junction zone of the Ural marginal trough and the Ural folds based on the analysis of paleotectonic reconstructions.
Method for determining reservoir pressure in horizontal gas wells of various profiles
This paper discusses the possibility of determining one of the main parameters — reservoir pressure in the specific volume of drainage of a horizontal gas well; reliable determination of reservoir pressure determines the effectiveness of decisions made to control a rational system for developing hydrocarbon deposits. An algorithm for determining the reservoir pressure of a zone drained by a horizontal gas well with various profiles is presented.
Improving development efficiency of porous fractured carbonate reservoirs’ with respect for wettability characteristics
The results of physical modelling and numerical studies of the efficiency of development processes for porous fractured type carbonate reservoirs with low-permeability matrix at steady and cyclic water flooding are presented. Quantitative patterns of influence on specific indicators of the development of natural and technological parameters for the development of scientific and methodological foundations of new energy-saving waterflooding technologies are obtained.
Currently, the field in article is a brown oil field, characterized by high costs of extracting remaining oil reserves. Dual production is actively used at the deposit, with all productive layers being developed by mechanized methods. To increase the efficiency of oil recovery and reduce operating costs, it was proposed to optimize the equipment layout for dual production of two objects and use a mechanical pressure transducer in combination with a sucker rod pump. In this study the candidate well was selected, the technical data of the pressure multiplier was calculated and equipment was selected using existing methods. The device does not require the supply of energy from the surface, which allows reducing the cost of operating development facilities.
Features of the organization of diagnostic maintenance of equipment and pipelines of oil and gas productions operated in difficult engineering and geological conditions
The article deals with the problem of organization of diagnostic maintenance and hazard assessment of local defects of equipment and pipelines operated in complex engineering and geological conditions. The peculiarity of such structures is the impact on the design of non-project loads, largely affecting both the real danger of local defects, and the operational reliability of the object as a whole. The article analyzes the existing approach to assessing the danger of local defects of equipment and pipelines, offers suggestions for its improvement in relation to structures operated in complex engineering and geological conditions, and puts forward general proposals for improving the system of diagnostic maintenance of such structures.
Mathematical model of multi-criteria optimization scheduling of branched system pipelines transportation
The article presents a mathematical model of optimal monthly scheduling of branched oil pipelines system operation. The multi-criteria nature of the task is shown. In addition to the criterion of energy consumption, the criteria for uniformity of pumping, the number of switching of pipeline operating modes and the value of the performance difference when changing the pipeline operating mode are considered. The mathematical model takes into account the following features: the presence of suppliers/consumers connected to the technological areas, the presence of technological areas with initial or final reservoir parks not available for scheduling, the presence of interval limitations on the oil intake/delivery/transshipment and the presence of partially defined schedules of oil intake/delivery/transshipment.
Investigation of flow regimes of air jet from drilling tool using thermomechanical method of development of pits in gas pipelines
Ensuring reliable and safe operation of gas pipelines is a priority. The results of studies of air flow from a drilling tool during interaction with the soil using the thermomechanical method of drilling pits in gas pipelines are considered. Practical recommendations for improvement of the technology of impact on the soil of the thermomechanical boring tool with use of the gas-turbine unit as a source of thermal and electric power for diagnosing the technical condition and repair of gas pipelines under various natural and climatic conditions are made.
Comparison of regulatory requirements for minimum distances from main gas pipelines to industrial and civil facilities taking into account technological risk
The article analyzes the system of monitoring minimum distances from pipelines to industrial and civil facilities in different countries. On the example of these countries, the principles of making technological decisions when assigning minimum distances from gas pipelines to industrial and civil facilities are considered. It is established that the indicators of technological risk associated with the reliability of the linear part of the main gas pipelines should be reduced by improving the quality of materials used, the quality of construction and operation of facilities.
Estimated level of stress concentration in joints of welded pipes and fittings (welded tees) of main pipelines
The article opens a series of publications on the results of a cycle of works on the estimated level of the stress-strain state of welded pipes joints of main pipelines with connecting parts of the following types: transitional and equal bore tees; concentric and eccentric transitions; elliptical plugs. The numerical solution of these types of problems was obtained by the finite element method using the free educational version of the computer program ANSYS Student. This article presents the calculating results of welded pipes with typical welded tees joints, and provides an assessment of the bearing capacity under various operating conditions.
The article deals with the issue of the anti-terrorist security of pipelines. The urgency of the problem is substantiated. Special attention is given to existing methods of detecting the impact of third parties on the pipeline. The analysis of these methods is provided. The authors proposed a comprehensive system for anti-terrorist security of the pipeline.
Calculation of automatic speed control devices of flaw detector in main gas pipeline
Local resistances created by the diagnostic projectile during the in-line flaw detection of a gas pipeline are calculated. In particular, the local resistance is cal- culated separately both at the input to and at the output from the flaw detector equipped with an automatic speed control system. Further, the calculations are combined and have a general form for the entire flaw detector as a whole. Some existing devices for automatic speed control of the flaw detector are conside- red by passing gas through the diagnostic projectile. The term "rate-quenching coefficient’ is introduced. The main problems of speed damping of the flaw detector are revealed. The necessary values of the regulated parameters are determined to ensure reliable diagnosis. Recommendations are given on the optimal parameters of the flaw detector and the speed control device to achieve the required speed of the flaw detector and the maximum speed-quenching coefficient.
Tools for formation of design task bases on basis of decision tables
In the article the reason of spending much time on adapting computer-aided design (CAD) of technological processes system for conditions of the concrete enterprise and of the concrete structural unit of this enterprise is stated. The article describes tools of one of the modules of the CAD system which enables technologists in different departments at the enterprise to fill up design tasks bases with required information which is presented in reference literature in the form of decision tables and to do it by themselves without administrator for reducing the time of adapting. An example of describing a design task on basis of a decision table with developed tools in specialized language is considered. The structure of specialized language operators used for describing is presented.
Gear mechanisms of periodic intermittent motion: designs, calculation methods, modeling
Gear mechanisms of periodic intermittent motion (discontinuous kinematics) quite widely used in mechanical engineering. The main advantage of such mechanisms in comparison with the Maltese is the required lower accuracy and manufacturing cost. However, the calculation of the gear mechanisms of intermittent motion is of considerable complexity, which is due to both the presence of many geometric parameters and the variability of kinetic and dynamic characte-ristics. Consequently, modern software is needed that would simplify the calculation and modeling of the elements of the mechanisms under consideration. The article provides an overview of the designs, as well as the basis of the methodology for computer-aided design of gear mechanisms of periodic intermittent motion. The results of computer modeling and calculation of the elements of mechanisms are presented.
Comprehensive evaluation of efficiency of creating infrastructure of liquefied natural gas in energy supply of regions
The article provides a methodology for creating LNG infrastructure with a detailed description of each stage, including a comprehensive assessment of various options for energy supply to consumers and defines the term “LNG infrastructure”. The authors introduce the concept of the LNG efficiency coefficient for energy supply of socio-economic objects, the value of which shows which of the energy supply options will be more effective.
Research of possibility of using anti-wear additive OK-16 in composition of domestic aviation kerosene
Comparative tests of laboratory samples of fuels based on kerosene fraction of hydrocracking with the addition of a new domestic anti-wear additive OK-16 and the currently used additive HITEC 580 are given, according to the indicators regulated by GOST 10227 and the “Standard Program for Qualification Testing of Experimental Designs of Fuels for TC-1 and RT”. It is shown that the anti-wear additive OK-16 is superior in lubricity to the currently used additive HITEC 580. When added to the kerosene fraction, the additive OK-16 does not adversely affect the physico-chemical parameters and performance properties of the fuel.
This article is dedicated to the development of the dry acid composition based on sulfamic acid for well bottomhole zone acid treatment after injection profile flattening treatment. The main disadvantage of the compositions of this kind is complications occurring at temperatures higher than 60oC due to intense hydrolysis of sulfamic acid. The presented results showed that this disadvantage could be eliminated. Thermal stability is attributed to sulfamic acid by addition of specific modifiers that shift the equilibrium of sulfamic acid hydrolysis to the original agents. The developed composition is workable, meets industrial standards and may be recommended for use during the injectivity profile flatte- ning treatment.
Sorption materials were obtained from sugar cane waste pyrolysis products; the pyrolysis process was carried out using bentonitic clay to limit the contact of plant waste with atmospheric oxygen. The sorption capacity of the developed materials with respect to low viscosity oil products was investigated. The buoyancy of the developed sorbent materials on the surface of kerosene was revealed. It is established that the sorbents obtained by the proposed method have higher sorption efficiency with respect to kerosene than commercial activated carbon from coconut shell. It is revealed that sorption materials based on the products of the pyrolysis of sugar cane waste can absorb kerosene in an amount greater than its own weight. It was also found that the rate of release of sorbed kerosene from waste materials from sugar cane is higher than that from commercial activated carbon based on coconut shell pyrolysis products.
Study of destruction of Study of destruction of solutions of high molecular weight polyisobutylenes in petroleum oilsolutions of high molecular weight polyisobutylenes in petroleum oil
Application of polyisobutylenes (PIB) in lubricants is often limited due to polymer degradation. Thermal oxidation and mechanical stability of solutions of PIB in oil with polymer concentration more than 1 % mass is still not well understood. This paper includes the results of the research of the PIB destruction with different molecular weights of domestic and foreign manufacturers. The influence of temperature, mechanical impact, molecular weights and concentration were investigated. It was found that the higher molecular weight or concentration is, the larger destruction of PIB is. Other patterns of PIB’s degradation are also presented in the article.